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/* Copyright (C) 2017 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 as published by the Free
* Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/**
* \file
*
* \author Giuseppe Longo <glongo@stamus-networks.com>
*
* Detection engine helper functions
*/
#include "suricata-common.h"
#include "suricata.h"
#include "detect.h"
#include "util-detect.h"
/**
* \brief Allocate SigString list member
*
* \retval Pointer to SigString
*/
SigString *SigStringAlloc(void)
{
SigString *sigstr = SCCalloc(1, sizeof(SigString));
if (unlikely(sigstr == NULL))
return NULL;
sigstr->line = 0;
return sigstr;
}
/**
* \brief Assigns the filename, signature, lineno to SigString list member
*
* \param sig pointer to SigString
* \param sig_file filename that contains the signature
* \param sig_str signature in string format
* \param sig_error signature parsing error
* \param line line line number
*
* \retval 1 on success 0 on failure
*/
static int SigStringAddSig(SigString *sig, const char *sig_file,
const char *sig_str, const char *sig_error,
int line)
{
if (sig_file == NULL || sig_str == NULL) {
return 0;
}
sig->filename = SCStrdup(sig_file);
if (sig->filename == NULL) {
SCLogError("Error allocating memory");
return 0;
}
sig->sig_str = SCStrdup(sig_str);
if (sig->sig_str == NULL) {
SCLogError("Error allocating memory");
SCFree(sig->filename);
return 0;
}
if (sig_error) {
sig->sig_error = SCStrdup(sig_error);
if (sig->sig_error == NULL) {
SCLogError("Error allocating memory");
SCFree(sig->filename);
SCFree(sig->sig_str);
return 0;
}
}
sig->line = line;
return 1;
}
/**
* \brief Append a new list member to SigString list
*
* \param list pointer to the start of the SigString list
* \param sig_file filename that contains the signature
* \param sig_str signature in string format
* \param line line line number
*
* \retval 1 on success 0 on failure
*/
int SigStringAppend(SigFileLoaderStat *sig_stats, const char *sig_file,
const char *sig_str, const char *sig_error, int line)
{
SigString *item = SigStringAlloc();
if (item == NULL) {
return 0;
}
if (!SigStringAddSig(item, sig_file, sig_str, sig_error, line)) {
SCFree(item);
return 0;
}
TAILQ_INSERT_TAIL(&sig_stats->failed_sigs, item, next);
return 1;
}
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